1. Department of Surgery, Robert C. Byrd Health Sciences Center/West Virginia University, Charleston Area Medical Center, Vascular Center of Excellence, Charleston, WV, USA
2. Center for Health Services and Outcomes Research, Charleston Area Medical Center Health Education and Research Institute, Charleston, WV, USA
3. Department of Surgery, Walter Reed National Military Medical Center, Bethesda, MD, USA
4. Florida Atlantic University, Charles E. Schmidt College of Medicine, Internal Medicine Department, Boca Raton, FL, USA